sanpookan 三宝柑 (さんぽうかん)mikan of the three treasureshooraikan 蓬萊柑（ほうらいかん）mikan like Mount Horai (in paradise)Citrus sulcata. . . CLICK here for Photos !grown in Yuasa, Wakayama pref.和歌山の湯浅という地方It was one of the three treasures given to the lord of Wakayama, and it was forbidden to take the plant outside of his domaine.Its skin is thick, but easy to peel and it had many kernels. Thus it was a symbol for many generations of a family.